Discussion
An Rh- individual receives Rh+ blood. The recipient becomes
Answer: D
Correct answer: Isoimmunised
The Rh-negative recipient has no D antigen, so the transfused Rh-positive cells are foreign and provoke an immune response - the recipient becomes isoimmunised, that is, sensitised, and now carries anti-D antibodies. The first transfusion often passes without a dramatic reaction; the danger is the next exposure, and, in a woman, a later Rh-positive pregnancy.
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